DE8129078U1 - "PLUG DEVICE FOR THE TWO-STAGE CLOSING OF AN EXHAUST GAS OPENING IN THE UPPER WALL OF A CAVITY TO BE FILLED WITH FOAM, IN PARTICULAR THE INTERIOR OF A PIPE COVERING IN POTENTIAL HEATING PIPE SYSTEMS" - Google Patents

Description

Olpl.-lng. Sigurd Leine ■ Dlpl.-Phya. Dr. Notbert KAnIg BurckhardtstraSe 1 Telephone (0511) 62 30

D-3000 Hannover 1

Date under sign

i.e. m? lller a / s 259/157 Sept. 28, 1981

Plug device for two-stage closing of an exhaust gas opening in the top wall of one with foam to be filled cavity, especially the interior of a pipe cladding in district heating pipe systems

The utility model relates to a plug device according to the preamble of claim 1.

Such a device and its application is described in DE-OS 22 52 295. The aim should be one Filling opening for a foaming liquid in an outer protective pipe lining at connection points between to close pre-insulated pipe sections in e.g. a district heating pipe system in two stages so that the filling opening after filling in the foam liquid to form a solid insulating foam inside the protective tube cladding is initially only partially closed in order to allow the foaming gas to escape enable, but without allowing the still liquid Insulating foam can emerge as a thick sausage through the filling opening; albeit a very thin foam sausage the hardening of the foam emerges ^ then this means

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no significant loss of viewing material, and the The fitter can then perform the second closure stage, namely an actual and permanent closure of the opening by closing the narrow drainage channel of the plug device.

As a result, the fitter can advantageously suspend this second and final closing stage until the Foam - usually polyurethane foam - at least initially solidifies, which largely results in the emission of harmful exhaust gases in the area of the workplace has stopped. However, this advantage is associated with the associated disadvantage that a really tight seal a canal already filled with plague foam is not possible with the desired high level of security. Another disadvantage consists in the fact that it is already after the final closure and an associated slight removal of the leaked foam is no longer possible to determine by visual assembly inspection whether the final Sealing has actually been carried out after the appearance of the foam, i.e. with no certainty that the interior of the pipe lining has also been completely filled with foam.

The purpose of the innovation is / a stopping device of the To create specified type, which can be used without the disadvantages mentioned.

The plug device according to the innovation is characterized / that it is two different with each other

Has the top connected plug body, one of which has a narrow exhaust duct and with a Underside open cavity is formed, while the other plug body with a clamping device for permanent sealing the opening is provided.

The first plug body can hereby be used for the first temporary closing of the filling opening, and if so the foam deviates through the narrow channel and is visible from the outside, a channel-closing reimbursement of the Foam soon follows, because an initial solidification already increases the flow resistance of the channel compared to the sticky one Foam mass increased considerably. Thus it will only be an insignificant one Amount of foam is lost until the escape and the emission of gas cease completely. Then the fitter pulls the first nozzle filling body out of the opening and puts the other nozzle body into it, after which he completes the latter Closing served. The final sealing can therefore pass through the sealing area without the existence of a foam strand take place, whereby a highly effective closing is possible. A visual statement later the total visual space filling of the room to be isolated achievable in that the first nozzle filler, the after the assembly of the second body is still coherent with the same, namely in an externally visible Way, already when the foam emerged, a quantity of foam was received in its mentioned cavity on the underside,

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bo that when or after pulling this plug body a visible trace of foam in this cavity complete foaming will make believable.

The innovation is explained in more detail below using the drawing, for example.
Show it

Fig. 1 is an illustration of a pipe cladding to be insulated,
Fig. 2 is a section through the upper part of

Pipe covering together with attached first plug body, and

3 shows a similar sectional view with the second plug body attached.

Fig. 1 shows a section of an already assembled Fernheiζungsleitung 2 with a collection cell, which of a tightly fitting pipe lining 4 is surrounded. To insulate the interior of this cladding, a The adjusted amount of a foaming polyurethane liquid is poured through an upper opening 6, after which the forming foam, the collected end pieces of the designated 8 central heating pipes within the cladding 4 is surrounded while the simultaneously developed Gases can escape through the opening 6.

To close the opening 6, a set of plugs consisting of two plug bodies 10 and 12 with a

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binding part 14 used.

The plug body 10, which is shown in more detail in Fig. 2, is with the connecting part 14 in a semi-soft Plastic made in one piece by injection molding, and it consists of a cup-like part with a cylindrical Flange 16, the outside of which is provided with a circular groove for receiving the edge of the opening 6 after simply knocking it in the plug body is provided in the opening, the inside of the cylinder flange 16 with corrugations 20 is provided. In the middle of the plug body there is a downwardly extending nozzle 22, the one continuous channel 24 with a very small diameter, e.g. 1 to 1.5 mm, and a considerable length having.

The plug body 10 is in the opening 6 directly after filling the foam liquid used, and when the panel 4 is completely filled with foam, is used at A little foam is forced out through the channel 24 as the pressure build-up or foam expansion continues. aside from that the foam in the ^ open at the bottom marked with 28 Penetrate the interior of the nozzle body. The foam is already undergoing initial solidification, and only one little foam will flow through the channel before this channel is clogged by the foam solidification. After this, there is another pressure build-up in the foam filling. The plug body 10 is, however, by means of the circumferential groove 18 secured against easy ejection.

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When the foam * has solidified at least temporarily, the fitter can come back to work and simply pull out the plug body 10, e.g. with the Connecting part 14 as a pull handle. Here the Amount of foam that has worked into the cavity 28, drawn to the outside, because it was through the corrugations 28 is recorded. When the plug body is pulled out, a corresponding depression is left in the show breed.

After pulling out the body 10, the plug set 10, 12, 14 is rotated, and the plug body 12 can now be installed in the opening 6.

This totally occlusive plug 12 can be of any type, if only a truly effective occlusion is guaranteed.

Fig. 3 shows a particularly advantageous embodiment, according to which the plug as an expansion plug with special Clamping means is formed. The plug shown has a downwardly protruding cylindrical socket 30, which with the connecting part 14 is made in one piece and the Inner wall is provided with an annular recess 32 in a plane below the edge of the opening 6. By the bushing 30 extends a clamping bolt 34 which has a lower end against the lower end of the bushing 30 Has head part 36 and whose central cylindrical part 38 corresponds to the inner width of the socket. Upstairs he has Bolt 34 has a threaded pin 40 with a clamping nut

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and a tension washer 44.

When tightening the nut 42, as shown on the left in Fig. 3, the bushing 30 will push itself out radially against the opening edge and the lower end of the bushing will thus Fold up so that ο will form in the curved area 46 below the edge of the opening, an extraordinary one tight clamping of the plug body is possible.

As shown, the plug bodies are mounted on the connector 14 in a mutually reversed orientation. After attachment of the plug 12, the plug body 10 (FIG. 3) will thereby assume an inverted position, whereby a visual inspection from above makes it easy to see whether the cavity was originally open to the bottom 28 is foam-filled or not, which can be essential for assembly control and later error investigation.

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Claims (5)

LEINE & KÖNIG PATE NTA N WA LTE DIpl.-Ing. SIgurd Leine ■ Dipl.-Phys. Or. Norbert König BurckharftstraBe 1 Telephone (0511) 62 30 D-3000 Hannover 1 Our reference date i.e. miller a / s 259/157 Sept. 28, 1981 claims for protection 1. Stoppselexnrichtung for two-stage closing of a Abgct *; opening in the top wall of one to be filled with foam Cavity, in particular the interior of a pipe lining in district heating pipe systems, which into the opening can be used to partially close the same and can then be actuated to completely close the opening, characterized in that the device has two different plug bodies (10, 12) connected to one another at the top, of which the one has a narrow exhaust gas duct (24) and is formed with a cavity (28) open on the underside, while the other plug body (12) with a clamping device (38, 42) for permanent tight closing the opening (6) is provided. 2. Stöpselexnrichtung according to claim 1, characterized in that the cavity 28 of the SJ / Ni - 2 - first plug body (10) laterally through the corrugated inner side (20) of a mainly cylindrical plug flange (16) is limited. 3. Plug device according to claim 1, characterized in that the other plug body (12) a cylindrical plug socket (30) made of defoiiabaren material with a continuous axial hole has, in which a clamping screw (38) is arranged for axial compression of the plug socket. 4. plug device according to claim 1, 2 and 3, characterized in that the plug socket (30) of the other plug body (12) and the entire first plug body (10) in one piece with one of these parts (10, 30) connecting handle-like strip part (14) are formed. 5. plug device according to claim 4, characterized in that the plug socket. (30) and the first plug body (10) extend from the strip portion (14) to opposite sides thereof.